74hct595 NXP Semiconductors, 74hct595 Datasheet - Page 21

• Manufacturer Part Number: 74hct595
• Description: 8-bit Serial-in/serial Or Parallel-out Shift Register With Output Latches; 3-state
• Manufacturer: NXP Semiconductors

Philips Semiconductors
2003 Jun 25
handbook, full pagewidth
handbook, full pagewidth
8-bit serial-in, serial or parallel-out shift
register with output latches; 3-state
74HC595: V
74HCT595: V
t
t
t
PLH
PLZ
PHZ
/t
/t
/t
TEST
PZL
PHL
PZH
M
M
= 50%; V
= 1.3 V; V
Fig.11 Waveforms showing the 3-state enable and disable times for input OE.
open
V
GND
I
= GND to V
I
CC
= GND to 3 V.
SWITCH
HIGH-to-OFF
OFF-to-HIGH
LOW-to-OFF
OFF-to-LOW
Qn output
Qn output
OE input
CC
GENERATOR
.
PULSE
10%
Fig.12 Test circuit for 3-state outputs.
C
R
Definitions for test circuit:
R
L
L
T
= Load resistor.
= Load capacitance including jig and probe capacitance.
= Termination resistance should be equal to the output impedance Z
V M
90%
V I
enabled
outputs
t PLZ
t r
t PHZ
R T
10%
D.U.T
V CC
90%
21
disabled
outputs
V O
C L
t PZL
R L = 1 k
t PZH
t f
50 pF
MGK563
V M
V M
outputs
enabled
74HC595; 74HCT595
MSA697
V CC
o
of the pulse generator.
Product specification